1122012100921 has 2 divisors, whose sum is σ = 1122012100922. Its totient is φ = 1122012100920.

The previous prime is 1122012100903. The next prime is 1122012100931. The reversal of 1122012100921 is 1290012102211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676670760000 + 445341340921 = 822600^2 + 667339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122012100921 - 2⁹ = 1122012100409 is a prime.

It is a super-2 number, since 2×1122012100921² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1122012100892 and 1122012100901.

It is not a weakly prime, because it can be changed into another prime (1122012100901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561006050460 + 561006050461.

It is an arithmetic number, because the mean of its divisors is an integer number (561006050461).

Almost surely, 2^{1122012100921} is an apocalyptic number.

It is an amenable number.

1122012100921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122012100921 is an equidigital number, since it uses as much as digits as its factorization.

1122012100921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

It can be divided in two parts, 112201 and 2100921, that added together give a palindrome (2213122).

The spelling of 1122012100921 in words is "one trillion, one hundred twenty-two billion, twelve million, one hundred thousand, nine hundred twenty-one".